Valve.



Patented Nov. 19,1901.

C. E. HUXLEY.

VALVE.

(Application filed Feb. 20, 1901.)

(No Model.)

W Z m a M Z M 5 6 /v 4 r M i I; f l9 1% UNllED STATES PATENT OFFICE.

CHARLES E. HUXLEY, OF CHICAGO, ILLINOIS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 686,854, dated November19, 1901; Application filed February 20, 1901. Serial No. 48,063. (Nomodel.)

T0 at whom it may concern: Be it known that I, CHARLES E. HUXLEY, ofChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Valves; and I do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

This invention relates to improvements in valves of that class in whichthe valve-closure is attached to an endwise-movable stem having screw-'threaded engagement with the valve-casing and by means of which theclosure may be moved toward and from its seat.

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a central vertical section of a globe-valvecontaining my improvements. Fig. 2 is an axial section of thevalve-closure shown in Fig. 1. Fig. 3 is a side elevation of a bushingforming part of the casing and with which the valve-stem hasscrew-threaded engagement. Figs. Land 5 are side and top plan views,respectively, of a bushing-attaching device forming part of theconstruction shown in Fig. 1. i Fig. 6 is an end view of said bushing.Fig. 7 is an axial section of a modified form of head through which thevalve-stem passes, showing another form of attaching means for thebushing for engagement with the valve-stem. Fig. 8 is a top plan view ofthe parts shown in Fig. 7. Fig. 9 is a plan view of a retaining-ring bywhich the bushing shown in Fig. 7 is held in place.

As shown in said drawings, A designates a valve-casing of an ordinaryglobe-valve provided on two sides thereof with tubular extensions A',which are interiorly screw-threaded for connection with pipes. Saidcasing is also provided at one side with a short neck A through whichthe valve-stem passes. The casing is provided interior-1y with anangular partition A in the horizontal part of which is formed avalve-seat a, said seat being herein shown as formed on the margin of aring A, which has screw-threaded engagement with said partition.

B designates a tubular head which fitsouta side of and hasscrew-threaded engagement with the neck A 0 designates a valve-stemwhich passes axially through said head and carries at its innor end avalve-closure O, engaging the seat a within the casing. Said stem isprovided at its outer end with a hand-wheel C by which it is rotated tomove the valve toward and from its seat.

Within the head B is located a removable cylindric bushing D, which ismade of a metal softer than that of the valve-stem and which isinteriorly screw-threaded to engage exterior screw-threads on thevalve-stem. Said bushing is normally non-rotative in said head, but maybe removed endwise therefrom and is capable of rotating in the head whenexcessive pressure is applied to seat the closure, as will appear morefully hereinafter. The bushing engages at its outer end an inturnedflange b at the outer end of said head, and at its inner end hasnon-rotative interlocking engagement with an apertu red disk E,whichlatter is clamped between a seat on the outer end of the neck A of thecasing and an internal shoulder b, formed in said head. Said disk iscentrally apertured for the passage of the valve-stem therethrough. Theinterlocking connection between the bushingand disk consists in thisinstance of oppositely-located lugs cl on the lower end of the bushing,which engage correspondinglydocated recesses or notches 6, formed in theupper margin of an annular flange E, which surrounds the centralaperture in said disk. A hollow cap F, centrally apertured for thepassage of the valve-stem therethrough, is fitted over the outer end ofthe head and has screw-threaded engagement therewith, and between saidcap and the outer end of the head, which latter is depressed, isinserteda mass of packing material f, the whole constituting astufiingbox to prevent the escape of steam or fluid between the same andthe stem. The frictional engagement of the disk E with the outer marginof the neck A on one side and the shoulder b of the head on the otherside is so graduated by the adjustment of the head upon the casing as tobe less than the friction between the screw-threaded surfaces of thevalve-stem C and the bushing D when abnormal power is applied to saidstem to seat the closure. When the stem is turned, therefore, with aforce greater than that sufficient to properly seat the valve-closure,the bushing D and disk E rotate with the stem after the closure isproperly seated, and injury or distortion of the valve closure or seator injury to the screw-threads of the stem is avoided. Said bushingbeing nonrotatively interlocked to the disk E and said disk having arelatively large bearing-surface with the head and easing near themargin of the disk, said parts may obviously be so adj usted.

as to produce a friction between said disk and coacting parts sufficientto prevent rotation of the bushing and disk before the valve closure isproperly seated and at the same time permit said parts to rotate whenexcessive force is applied to the stem before such force is sufficientto distort the valve closure or seat or the screw-threads of the stem.

As a further and separate improvement the valve-stem is provided betweenthe valveclosure 0 and the disk E with a secondary valve-closure, hereinshown as-formed on a radial flange c, which is rounded on its faceadjacent to the disk and which engages a seat 6, formed on the underface of-the disk E. With this construction when the valve-stem is turnedoutwardly to bring the secondary valve-closure c in engagement with theseat e leakage of steam or other fluid past the disk is effectuallyprevented. Moreover, with this construction when the packing f is to berenewed it is not necessary to close the valve against the passage ofsteam or other fluid therethrough but said valve-closure 0 may be movedup tightly against its seat 6, at which time the cap F and packingf maybe removed and new packing substituted without any danger of steamescaping through the head;

In Figs. 7, 8, and 9 is shown a construction wherein the removablebushing which engages the valve-stem is non-rotatively fixed withrespect to the head. As shown in said figures, G designates-a tubularhead corresponding to the head B and provided atits inner end with anannular flange g, exteriorly screw-threaded to fit within aninteriorlyscrew-threaded seat in the casing A Said head is provided atits upper end with a radial flange g, surrounding the bore of the headand formed to permit the passage of the valvestem therethrough. Hdesignates a cylindric bushing located within said head. Said bushingabuts at its outer end against the flange g and is held in place byengagement at its lower ,end with an exteriorly-screwthreaded ring I,which engagesinterior screwthreads in the lower end of the bore of saidhead. Said bushing is provided at its upper end with oppositely-locatedlugs 71, which engage correspondin gly-located recesses orsockets 'g inthe flange g and which holds said bushing non-rotative in said head.

In Fig. 2 is shown an approved form of valve-closure, said closure beingprovided with aremovable face which may be renewed when it has becomeworn or otherwise distorted. Said closure consistsprincipally of twodisks 0 G which are apertured to fit over a reduced screw-threadedportion 0' of the stem. The inner disk is provided on its upper facewith a plurality of lugs 0 which are adapted to be bent inwardly toengage a shallow annular shoulder c on the valve-stem, said lugs fittingloosely on said stem to permit the disk C to revolve freely thereon. Theother or wearing disk 0 is held in engagement with the disk 0 by meansof a nut 0 which engages the screw-threaded reduced lower end 0' of thestem. With this construction the disk 0 may be readily removed when suchremoval is .desired by reason of wear or distortion and there being noappreciable wear on the disk 0 said disk will under ordinarycircumstances remain intact during the life of the valve.

I do not wish to be restricted to the particular forms of my improvementherein shown, except as hereinafter specifically claimed, as it isobvious that some of the details thereof may be varied without departingfrom the spirit of my invention.

I claimas my invention-- 1. A valve comprising a hollow casing, avalve-seat, a valve-closure, a stem for actuating said closure, and acylindric bushing which fitswithin a cylindric recess in the easing andwhich has screw-threaded connection withsaid valve-stem,saidbushinghaving nonrotative interlocking connection by means of'endwise-project-ing lugs at one of its ends with a part which isnormally'stationary with r'espectto the casing, and an annulardetachablepart engaging. the casing and bearing on one end of'thebushing to hold the same in place in said recess.

2. A valve comprising. a hollow casing, a valve-seat, a valve-closure, astem for actuating said closure, a bushing havingscrew threadedconnection with said valve, a disk which has adjustable frictionalengagement at its margin with the casing and which is normally fixedwith respect to said casing, and interlocking connections between saiddiskand bushing.

3. A valve comprising a hollow casing-a valve-seat, a valve-closure, astem for actuating said closure, a tubular head secured to said casing,a cylindric bushing in said head having screw-threaded connection withsaid valve-stem, a disk clamped between the easingand a shoulder on saidhead, and non-rotative, interlocking connections between the bushing anddisk.

4. A valve comprising a casing, a valveseat, a valve-closure, a stem foractuating said closure, a head which has screw-threaded engagement withsaid casing, a cylindric bushing in the casing havingscrew-threadedconnection with said valve stem, a disk clamped between an internalshoulder in said head and the casing, said disk being apertured for thepassage of the stem there- Ice through, nonrotative interlockingconnections between said disk and one end of the bushing and a part onthe head engaging the othere'nd of the bushing.

5. A valve comprising a casing, a valveseat, a valve-closure, a stem foractuating said closure,abushing which has screw-threaded engagement withthe stem, a disk which covers the opening in the casing through whichsaid stem passes and is apertured for the passage of the stemtherethrough, said disk having frictional engagement with the casing,and non-rotatively interlocked with the bushing, a packing surroundingsaid stem outside of said disk, and a secondary valveclosure on saidstem inside of the disk adapted to engage a seat on the adjacent face ofthe disk when the principal closure is moved away from its seat.

6. A valve-closure comprising a casing, a

valve-seat, a valve-closure, a stem for actuating said closure, a headwhich is detachably fitted to said casing, a cylindric bushing in saidhead which has screw-threaded engagement with the stem, a disk clampedbetween the said casing and an interior shoulder in said head, andnon-rotatively interlocked with said bushing, and a secondaryvalve-closure on said stem inside of the disk adapted to engage a seaton the adjacent face of the disk when the moved away from its seat.

In testimony that I claim the foregoing as my invention I affix mysignature, in presence of two Witnesses, this 18th day of February, A.D. 1901.

CHARLES E. HUXLEY. Witnesses:

O. CLARENCE POOLE, WILLIAM L. HALL.

principal closure is V

